PJ / FW, " four reds ". " something beneath the aircraft ".
This assumes that PAPI was visible sometime after 'first contact'. Furthermore this poses the question, contact with which feature.
Conventional overland NPAs require visual contact with the runway environment, which can be interpreted as not requiring contact with the runway, and in extreme no approach lights.
I don’t know about at MDA but the PAPIs were very likely visible during the latter stages of the approach. Why? Because on the airport video you can see the 737 on finals for both approaches, so the vis was good enough. The PAPIs are lit on the video as well.
For us all red or all white visual slope guidance is a mandatory go-around below 1,000R because the approach is unstable (some exceptions).